Chip Formation Mechanisms and the Process Model during Ultra-precision Turning of SiC_p/ Al Composite
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2015-01-01 |
| Journal | Acta Armamentarii |
| Authors | GE Ying-fe |
| Institutions | Aerospace Technology Institute |
| Citations | 2 |
Abstract
Section titled āAbstractāSingle crystal diamond and polycrystalline diamond tools are selected for ultra-precision turning of Si C particulate reinforced aluminum matrix composites( Si Cp/2024 Al and Si Cp/ ZL101A). The appearance and the metallurgical microstructure of chip are observed in order to investigate the formation mechanisms of chip using micromechanics and metal cutting theory analytical methods. The chip formation process models are also established. The results show that a saw-toothed chip with semi-periodic thickness is formed. It is pointed that the dynamic behavior of microcracks and the periodic variation of shear angle are the two main mechanisms for this type of chip. A great number of microcracks and microvoids are produced on this kind of material during machining due to the inherent defects and,non-uni-formity of the materials and the presence of the reinforcement particles. The periodic variation of shear angle is determined by the workpiece microstructure and the mechanical properties and the periodic slipstick phenomenon. Volume fraction of reinforcement,cutting speed,feed rate and tool edge radius are the main factors that affect the chip formation.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal Sourceā- DOI: None